Lab46 Wiki

#keyPresses.py
#
#Key Press Events
#
import pygame
 
screen = pygame.display.set_mode((640, 480))		#Pygame screen @ 640 X 480
pygame.display.set_caption("keyPresses.py")		#Pygame window title
LINE_COLORS = [(255, 0, 0), (0, 255, 0), (0, 0, 255)]	#Red, Green, and Blue RGB Values
x = 0 							#LINE_COLORS[] Subscript
BG_COLOR = (0, 0, 0)					#Black RGB Value
clock = pygame.time.Clock()				#Pygame clock
FPS = 60						#60 FPS
running = True						#Main game loop flag variable
 
while running:
	#For loop to check pygame events. The nested if statements check
	#for either the quit event or the keydown events. After it finds a 
	#keyboard event it specifically looks for the down button. When it
	#finds the down button it cycles through the RGB values in LINE_COLORS[]
	#to change the background color.
	for event in pygame.event.get():
		if event.type == pygame.QUIT:
			running = False
		elif event.type == pygame.KEYDOWN:
			if event.key == pygame.K_DOWN:
				if x == 3:
					x = 0
				screen.fill(LINE_COLORS[x])
				x += 1
 
	pygame.display.flip()	#Updates display
	clock.tick(FPS)		#Sets the framerate